This post will guide you How to Hide Users List from Login Screen in Ubuntu 12.10 Quantal Quetzal and you can use the same with Ubuntu 12.04 LTS Precise Pangolin.

There was window called “Remote Login” which gives you facilitiy to login with Online Account. Same like me few users will never wants this option so if they want to disable it for those i have shared this howto.

If you have the same problem or confusion this post is your friend.

DO IT AT YOUR OWN RISK.

1) You have to be root to perform this how-to.
If you are not root then be root by executing following command :-
ubuntu-11.10@tejas-barot-linux-ahmedabad:~$ sudo su – ( Single Hyphen )

2) First of all Please take backup of original file, execute following command :-root@tejas-barot-linux-ahmedabad:~# cp -p /etc/lightdm/lightdm.conf /etc/lightdm/lightdm.conf.orig